package kjh820909.basic;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
// ctrl + shift + o import자동생성~~~~~!!!!!!!

/*import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;*/

//import java.sql.*;

public class J20_BookDBDAO implements J20_BookDBService {
	
	// JDBC 접속정보
	private static final String DRV ="oracle.jdbc.OracleDriver";
	private static final String URL ="jdbc:oracle:thin:@//localhost:1521/xe";
	private static final String USR ="scott";
	private static final String PWD ="TIGER";
	
	// SQL문 정의
	private static final String insertSQL =
			" insert into bookdb (id,title,publisher,author) "+
			" values (bookid.nextval,?,?,?)";
	
	private static final String selectSQL =
			" select id, title from bookdb order by id desc ";
	
	private static final String selectSQL2 =
			" select * from bookdb where id = ? ";
	
	private static final String deleteSQL =
			" delete from bookdb where id = ? ";
	
	private static final String updateSQL =
			" update bookdb set title = ?, publisher = ?, author = ?, regdate = sysdate where id = ? ";
	
	@Override
	public int insertBookDB(J20_BookDBVO bvo) {
		Connection conn = null;
		PreparedStatement ps = null;
		int cnt = 0;
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(insertSQL);
				ps.setString(1, bvo.getTitle());
				ps.setString(2, bvo.getPublisher());
				ps.setString(3, bvo.getAuthor());
		
			cnt = ps.executeUpdate();
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(ps!=null)try{ps.close();}catch(Exception e){}
			if(conn!=null)try{conn.close();}catch(Exception e){}
			
		}
		return cnt;
	}

	@Override
	public String selectBookDB() {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null; // 추가됨!
		String result = ""; // 나중에  ArrayList로 변경예정
		
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(selectSQL);
			rs = ps.executeQuery();
			
			// select문 실행 후 결과 처리
			while(rs.next()){
				for(int i=1; i<=2; ++i)
					result += rs.getString(i)+" ";
				result += "\n";
			}
			
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(rs != null)try{rs.close();}catch(Exception e){}
			if(ps != null)try{ps.close();}catch(Exception e){}
			if(conn != null)try{conn.close();}catch(Exception e){}
		}
		return result;
	}

	@Override
	public String selectBookDB(String id) {
		Connection conn = null;
		PreparedStatement ps = null;
		ResultSet rs = null;
		String result = "";
		
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(selectSQL2);
				ps.setString(1, id);
			rs = ps.executeQuery();
			
			while(rs.next()){
				for(int i=1; i<=5; ++i)
					result += rs.getString(i)+" ";
				result += "\n";
			}
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(rs != null)try{rs.close();}catch(Exception e){}
			if(ps != null)try{ps.close();}catch(Exception e){}
			if(conn != null)try{conn.close();}catch(Exception e){}
		}
		
		return result;
	}

	@Override
	public int updateBookDB(J20_BookDBVO bvo) {
		Connection conn = null;
		PreparedStatement ps = null;
		int cnt = 0;
		
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(updateSQL);
				ps.setString(1, bvo.getTitle());
				ps.setString(2, bvo.getPublisher());
				ps.setString(3, bvo.getAuthor());
				ps.setString(4, bvo.getId());
		
			cnt = ps.executeUpdate();
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(ps!=null)try{ps.close();}catch(Exception e){}
			if(conn!=null)try{conn.close();}catch(Exception e){}			
		}
		
		return cnt;
	}

	@Override
	public int deleteBookDB(String id) {
		Connection conn = null;
		PreparedStatement ps = null;
		int cnt = 0;
		
		try{
			Class.forName(DRV);
			conn = DriverManager.getConnection(URL, USR, PWD);
			ps = conn.prepareStatement(deleteSQL);
				ps.setString(1, id);
			cnt = ps.executeUpdate();
		}catch(Exception ex){
			ex.printStackTrace();
		}finally{
			if(ps!=null)try{ps.close();}catch(Exception e){}
			if(conn!=null)try{conn.close();}catch(Exception e){}	
		}
		return cnt;
	}

}
